Traders Peter Tuchman (L) and Joseph Mastrolia work on the floor of the New York Stock Exchange while wearing 2015 novelty glasses on New Year's Eve, the last trading day of the year, in New York December 31, 2014. REUTERS/Carlo Allegri (UNITED STATES - Tags: SOCIETY BUSINESS TPX IMAGES OF THE DAY)

Traders Peter Tuchman (L) and Joseph Mastrolia work on the floor of the New York Stock Exchange while wearing 2015 novelty glasses on New Year's Eve, the last trading day of the year, in New York December 31, 2014. REUTERS/Carlo Allegri (UNITED STATES - Tags: SOCIETY BUSINESS TPX IMAGES OF THE DAY)